Question

1+2+3+4+5.... +20 what is its sum​

Answer 1

Answer:

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Step-by-step explanation:

sum of first n natural numbers = n(n + 1)/2

sum of first 20 natural numbers = 20 * 21 / 2 = 210

Answer 2

Answer:

Step-by-step explanation:

210 is a sum of number series from 1 to 20 by applying the values of input parameters in the formula.

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